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What are all the demerits in having a winglet

by sakthivelzz
Tags: winglets, wingloading
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sakthivelzz
#1
Dec24-10, 11:23 AM
P: 3
Hi everyone!!! I'm new to this community ...I need to know few things about winglets..

1) what are all the demerits in having a winglet other than adding up wingloading,viscous drag ???

please reply only if ur sure about your answer as am working out for my thesis...

thank you...
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NobodySpecial
#2
Dec24-10, 01:48 PM
P: 474
Quote Quote by sakthivelzz View Post
1) what are all the demerits in having a winglet other than adding up wingloading,viscous drag ???
There is a fixed cost in buying them, especially as an after-market feature.
Plus the cost of taking the aircraft out of service to install them and the extra cost of routine inspections.

West-jet were trying them on their fleet and published some numbers showing the fuel savings had saved about 10% of the cost of installing them.
Mostly because they have very high fleet utilization - so aircraft out of service are very expensive, and they fly mostly commuter routes so spend proportionally less time at cruise where the fuel savings are greatest
viscousflow
#3
Dec24-10, 05:10 PM
P: 273
Cons:
-Additional structure required to support them
-Thus additional weight to the aircraft
-Aeroelastic behavior changes

Just a few off the top of my head


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